Koenigsegg managed to trump its 805 horsepower CCR model when the small Swedish automaker introduced the ultra high-performance CCX supercar in 2006. The CCX is an evolution of the CCR that finally meets strict U.S. regulations.

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Koenigsegg Automotive AB, based in Margetetorp, Sweden, was created for the sole purpose of producing super high performance sports cars. The company's founder, Christian von Koenigsegg, founded the company when he was just 22.

The CCX - literally, Competition Coupe X (the X is for the 10th anniversary of Koenigsegg's first test vehicle, the CC - features a 4.7 liter V8 based Ford's popular modular V8. The twin-supercharged Koenigsegg motor, built by Formula 1 builder Grainger and Worrall in the United Kingdom, puts out 806 horsepower at 6,900 RPM and 678 lb-ft. of torque at 5,700 RPM. The motor is made of lightweight aluminum subjected to extensive heat treatment. Impressively, the CCX generates this power using 91 octane fuel available at almost any gas station.

More recently, a CCXR was added to the line-up. Based on the CCX chassis and sharing its main parts, the CCXR features an engine tuned to run on both pump gas, where it makes the same 806 bhp as the CCX, or on E85 (85 percent ethanol mix with regular gasoline) or E100 fuel, and that's when it produces 1,018 bhp. Apart from this enhanced powerplant, the CCX and CCXR are mostly identical.

A six-speed manual transmission produced by Cima is standard and a six-speed sequential transmission is available as an option. A limited slip rear differential is also standard.

Various sources have pegged the CCX's 0-60 time at 3.2 seconds and the standing quarter mile a tick under 10 at 146 miles per hour. The top speed is estimated to exceed 240 miles per hour.

The CCX's body is made of ultra light-weight carbon fiber, foam (sandwiched inside the panels for strength and shape) and Kevlar. The sports car's underbody is completely flat for aerodynamics, which helps contribute to the low 0.297 coefficient of drag. An electronically adjustable hydraulic ride height (controlled in the cabin) lowers the CCX at higher speeds for stability and aerodynamics.

The CCX rides on 19 inch front and 20 inch rear magnesium alloy wheels and features large vented disc brakes front and rear. Special Michelin Pilot Sport 2 tires capable of withstanding high speeds are standard. These high performance tires, combined with a stiff, race-engineered suspension, are capable of providing up to 1.3 lateral Gs of grip.

Certain changes to meet U.S. regulations were made to the body, including enlarged bumpers for crash protection. Inside, the CCX features seats that allow for additional headroom compared to the outgoing CCR.

Because the CCX is an ultra high-end vehicle, options range the gamut. Leather seats, power windows and locks and air conditioning are standard. Clear coated carbon fiber exterior trim, a roll cage with a four point safety harness and carbon/ceramic brake discs highlight the nearly limitless option list